Ventilator screen



g 1 J. H. JENSEN ET'AL 2,564,011

'VENTILATOR SCREEN Filed March 25, 1949 5 Sheets-Sheet l 6 27 23 2 1 .FQg-j mvznrrons DJIRust 8 BY 5 22 J1 ATTORNEYS J .HJJensen J. H. JENSEN ET AL Aug. 14, 1951 VENTILATOR SCREEN 3 SheetsSheet 2 Filed March 25, 1949 mvzm'ons DJIRLLSZ .1 J-LJensen WW2,

mu m S Q ATTORNEYS J. H. JENSEN ET AL Aug. 14, 1951 VENTILATOR SCREEN 5 Sheets-Sheet Filed March 25, 1949 INVENTORS .22 JR usi .IJ-LJensen Fig.5

Mimi ATTORNEYS Pate'nted Aug. 14, l95i UNITED STATES PATENT QFFHCE VENTILATOR SCREEN Application March 25, 1949, Serial No. 83,388

1 Claim. 1

This invention relates to part-screens for Windows; one object of the invention being to provide a novel portable, window screen of this type adapted to be mounted in an otherwise unscreened window frame in position to cover a partial opening of the window and thus prevent the entry of flies and other insects, yet permitting of the desired ventilation.

A second object of the invention is to provide a ventilator screen, as above, which is designed to be mounted in the window frame in position which permits of opening and closing of the adjacent window without obstruction.

Another object of the invention is to provide a ventilator screen which includes a novel friction holding mechanism operative to effectively lock the screen in place in a Window frame without the use of screws, nails, or the like; such friction holding mechanism being manuall quick;- engaged or released.

A further object of the invention is to provide a ventilator screen which, when mounted in place, has a close, insect-proof fit in the window frame and relative to the adjacent window or sash, even when the latter is partially open; the screen being adjustable in length to compensate for the differential in width of window frames.

Another object of the invention is to provide a ventilator screen which is light weight, but rugged and weather-proof; being constructed so that it may remain in place over long periods of time Without deterioration.

It is also an object of the invention to provide a ventilator screen which is simple in structure, being designed for ease and economy of manufacture, and for handy, convenient use.

A still further object of the invention is to provide a practical and reliable ventilator screen, and one which will be exceedingly effective for the purpose for which it is designed.

These object are accomplished by means of such structure and relative arrangement of parts as will fully appear by a perusal of the following specification andclai-ms.

In the drawings:

Fig. 1 is an elevation of the novel ventilator screen taken from the inside; the view being foreshortened.

Fig. 2 is a similar View, but is taken from the outside of the ventilator screen.

Fig. 3 is a top plan view of the ventilator screen as mounted in a window frame for use.

Fig. 4 is a sectional plan on line 4-4 of Fig. 1.

Fig. 5 is an end elevation, partly broken away, of the ventilator screen as in use.

Fig. 6 is a transverse section on line fi6 of Fig. 1.

Referring now more particularly to the characters of reference on the drawings, the numeral l indicates an upstanding, horizontally elongated rectangular frame which includes a top rail 2, a parallel bottom rail 3, and end posts i. The adjacent ends of the above rails and posts are engaged in face to face relation and secured togather, as by spot welding; the end post 4 being ribbed, as at 5, for added strength.

The above described frame is fitted, in full covering relation, with a screen 5, which screen may he wire cloth, plastic cloth, or a louvred metal screen; the latter producing a no-draft ventilator.

The screen ii is secured and tensiond in the frame i by folding the upper and lower longitudinal edges of said screen, as at 7, into upwardly and downwardly opening, longitudinal channels 5% formed along the top rail 2 and bottom rail 3, respectively; the folded portions l of the screen being clamped in the channels 8.

At opposite ends of the rectangular frame I, and in front of said ends, the ventilator includes upstanding, flat facing guide strips 9 mounted for limited in or out adjustment, longitudinally of the ventilator, by means of tongues ll! which project through elongated slots Ii in the rails 2 and 3; the tongues iii, after passing through slots, being upturned, as at iiia, to prevent their escape. In this manner the upstanding guide strips 9 are adjustable to increase or decrease the effective length of the ventilator within a limited range.

Each of the guide strips 53 is formed, at the outside edge, with a forwardly projecting, rightangle flange i2, which flange is in turn formed a predetermined distance from the strip 9 with vertically spaced, laterally outwardly bent locator lips i3.

Between the locator lips l3, and substantially centrally of its ends, each flange 12 includes an outwardly projecting ear i4, and a locking lever i5 is pivoted transversely at one end to said looking lever, as at it, and projects outwardly from the ear M for swinging in a vertical plane.

At its free end each locking lever 15 is formed with a relatively Wide, outwardly facing, eccentric cam H, which includes transverse teeth or serrations l8 thereon.

Each locking lever 15 is formed, at its top edge and intermediate its ends, with a laterally projecting finger grip l9, while the lower edge of such lever includes a laterally, inwardly extending stop adapted to abut against the corresponding ear 14 whereby to prevent the lever I5 from dropping beyond dead-center; each such lever I5 normally being disposed at an upward and outward incline, as shown.

When the described ventilator screen is in use it is disposed in the window frame with the bottom rail 3 seated on the sill 2| of such frame; said bottom rail 3 including a downwardly and outwardly inclined bottom flange 22 which seats in generally conforming relation on said sill. The top rail 2 includes a similar flange 23 which inclines outwardly and upwardly.

The ventilator is placed on the sill 2! in generally alined relation between the parting beads 26 of the window frame; the guide strips 9 then being adjusted laterally until the flange l2 and locator lips l3 abut the inner edge and outer face, respectively, of the corresponding parting bead 24. In this manner the ventilator screen is located in the window frame in a predetermined position, and in which position the guide strips 9 are disposed very close to the outer face of the frame, including the bottom rail 25, of the lower sash 26. In other words, the outer face of the frame of the lower sash 26 runsat its endsup and down the guide strips 9 with partial opening, or closing, of the lower sash 26.

The upper edges of the guide strips 9 are rounded or beveled, as at 21, to assure against such edges biting into the frame of the sash 26 as it is run up or down.

When the ventilator screen is mounted in a window frame, as above described, and in the position indicated, the locking levers [5 each extend transversely of the lower portion of the corresponding channel 28 of the upper sash, which channel remains unused, or open, as long as the upper sash is in its raised position. Each of the locking levers I5 is swung downwardly, by finger engagement of the grip [9, until the serrated cam I! frictionally bears against, and bites into, the outer stop 29 of said channel 28. This locking of the levers l5 frictionally binds the locator lips [3 against the parting beads 24, whereby the ventilator screen is secured firmly in the window frame, and in the desired position of use.

With the described ventilator screen mounted in a window frame, as above, the lower sash 26 can be partially raised for ventilation, and the ventilator screen then effectively assuring against the entry of flies or other insects through the part-open window.

The ventilator screen permits the window to be closed without removing or interfering with the screen as mounted in place in the window frame. This is an advantageous feature, as it adds greatly to the convenience of the device.

As the device is light weight, readily portable, and easily installed, it can be used by anyone with convenience.

To remove the ventilator screen from .the window requires only a simple manipulation of the locking levers [5 to swing them upwardly to a released position, whereupon the guide strips 9 can be shifted laterally inwardly and the device withdrawn from the window frame.

While the device has been described with respect to its mounting in a window frame at the bottom thereof exteriorly of the lower sash 26, such device may-upon being inverted and secured in the upper portion of the inner sash channels of the window frame-be used at the top of the latter.

From the foregoing description it will be readily seen that there has been produced such a device as substantially fulfills the objects of the invention, as set forth herein.

While this specification sets forth in detail the present and preferred construction of the device, still in practice such deviations from such detail may be resorted to as do not form a departure from the spirit of the invention, as defined by the appended claims.

Having thus described the invention, the following is claimed as new and useful, and upon which Letters Patent are desired:

A locating and locking means for a detachable window screen comprising a flat guide strip mounted on the screen at each end thereof and projecting beyond the adjacent end of the screen, a vertical flange on the outer edge of each strip extending at right angles thereto and back from the front face of the strip, a lip on the outer edge of each flange and projecting therefrom to engage the back side of the parting bead of a window sash, a manually operable lever pivoted at one end on each flange parallel thereto and adjacent the vertical plane of the lip, and a cam on the outer end of the lever and projecting from the side thereof opposite the flange to dispose the cam' in position for pressing engagement with the face of a sash-channel opposite the side of the parting bead engaged by the lip upon downward swinging movement of the lever; the flange being formed with an ear projecting back therefrom and on which the lever is pivoted whereby the lever may be swung to a vertical position without interfering with the flange so as to dispose the lever out of the way for placement or removal of the screen into or out of position in the window.

JACK H. JENSEN. DAVID J. RUST.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS 

